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Hi Jim,
It has an oily feel to it similar to WD40 & initially I thought it
might be helpful running a brushed motor in
something that would lubricate the brushes.
I hadn't thought of it dissolving grease. That would be a good experiment
to try out next.
Thanks
Alan
----- Original Message -----
Sent: Tuesday, December 28, 2010 11:01
AM
Subject: Re: [PSUBS-MAILIST] Shellsol D60
experiment
Alan,
Do you think there should be any concern about the D60 penetrating
bearings and seals and desolving lubricants?
Jim
Hi Emile,
It's mineral spirits that have been highly
refined & this makes it less likely to break down plastics.
The high degree of general refining gives
this solvent its
low level of impurities such as sulphur,
olefins, benzene and total aromatics,
and low odor.
The WD40 that you use is 50% mineral spirits
but damages some plastics a lot more quickly than
Shellsol D60 (see my experiment results bottom
of page).
It's the best I could find within the criteria
of low viscosity, doesn't damage plastic, non corrosive, non
conductive
& cheap.
I'm no expert on chemicals but was referred to
this product by knowledgeable people in the chemical
industry.
Regards Alan
----- Original Message -----
Sent: Tuesday, December 28, 2010 9:50
AM
Subject: RE: [PSUBS-MAILIST] Shelsol
D60 experiment
The datasheet
said that it is an solvent; Will not solve the plastics in the
engine??
Emile
Hi
Carsten,
Here is a link to the Shellsol D60 pdf.
http://www.scdynamiccontent.shell.com/Files/aliphaticmineralspirits_shellsold60_americas.pdf
It
has a cubic expansion coefficient @ 20 degrees C.
To be honest I don't
know how to interpret this information,
but possibly you can, If not
I'll cook some up.
Alan
----- Original Message -----
From:
<MerlinSub@t-online.de>
To:
<personal_submersibles@psubs.org>
Sent: Friday, December 24, 2010
9:48 PM
Subject: Re: [PSUBS-MAILIST] Shelsol D60
experiment
Hi Alan, can you do us a favour?
Heat up
100 ml or 200ml of the D60 oil from 20 to 60 or 80 degree in a
jena
glass cup with scale and meassure the volume
change?
www.chemoline.de/images/d53247ab0ehoheform.jpg
If the Glas
cup is high as possible with a small base shall give good
measuring
results ever with a lower amount of oil volume.
http://www.orange-sinne.de/uploads/pics/reagenzglas_01.jpg
I
try to us the D60 oil maybe in the Euronaut Bowthruster insted of
WD40
which expand - seems a lot.
Also it seems that WD40 vapour at higher
degrees and create overpressure..
happy Christmas to all
Carsten
<JimToddPsub@aol.com> schrieb:
> Hi
Alan,
>
> Now that you mention it I recall the issue
with the brushes lifting. As
> with most areas in life,
everything seems to be a trade off. I'll stay
> tuned to
the search for the perfect fluid.
>
> It would be
interesting to know the coefficient of thermal expansion for
>
various fluids at the temperatures generated by the motors in our
operating
> environments. It seems there would be
several variables: continuous and
> intermittent run
time, cooling effect of the water, etc. Perhaps there
>
isn't enough expansion variation from fluid to fluid to even be concerned
with
> it. One can over-think these
things.
>
> Thanks,
>
Jim
>
>
> In a message dated 12/23/2010
5:59:18 P.M. Central Standard Time,
> alanjames@xtra.co.nz
writes:
>
> Hi Jim,
> I started off using a mineral oil
in my small DC brushed linear actuator
> motors.
> This
was too viscous & created (as Phil describes it) a "herky
Jerky"
> movement due to it's centrifugal motion
>
causing the brushes to lift temporarily. Possibly larger motors would
be
> OK.
> Another option I looked at was WD40 wich is
used by Psubbers for motor
> compensation & is also mainly
mineral spirits.
>
> The WD40 can degrade some plastics
quickly due to the levels of aromatics
> & although people
have used it successfully in motors,
> my application was primarily
for inside linear actuators that have
> electronics, so didn't
want to chance it.
> I couldn't track down a silicone with a
low enough viscosity & if I had it
> probably would have
cost a fortune.
> The Shelsol D60 was recommended to me by a
chemical importer, as it had a
> low viscosity & was
highly refined with a
> low level of aromatics. It also has a higher
flash point than WD40.
> Regards
Alan
>
>
>
> ----- Original Message
-----
> From: _JimToddPsub@aol.com_ (mailto:JimToddPsub@aol.com)
>
To: _personal_submersibles@psubs.org_
> (mailto:personal_submersibles@psubs.org)
>
Sent: Friday, December 24, 2010 11:31 AM
> Subject: Re:
[PSUBS-MAILIST] Shelsol D60 experiment
>
>
> Hi
Alan,
>
> Interesting to hear how the various plastics
stood up to D60. Why would
> you use mineral spirits (a
solvent) instead of light mineral oil as a
> compensating
fluid?
>
> Jim
>
>
> In a
message dated 12/23/2010 2:31:22 P.M. Central Standard Time,
>
_alanjames@xtra.co.nz_ (mailto:alanjames@xtra.co.nz)
writes:
>
> Hi,
> A couple of months back I posted that
I was experimenting with Shelsol D60
> for use as a
>
compensating fluid for my motors & linear actuators.
>
This is a low viscosity, low aromatic mineral spirit.
> _http://www.scdynamiccontent.shell.com/Files/aliphaticmineralspirits_shellso
>
ld60_americas.pdf_
> (http://www.scdynamiccontent.shell.com/Files/aliphaticmineralspirits_shellsold60_americas.pdf)
>
I left polystyrene, acrylic, & bits & pieces of household
plastic soaking
> in it.
> I just noticed that after 2&1/2
months the polystyrene had shriveled
> slightly &
sunk.
> This was a good result compared with WD40 wich did
this to the polystyrene
> in less than a
> day.
> The
Shelsol also caused some of the cheap plastics to become brittle.
The
> Acrylic, acetate
> & some other plastics (not sure
what they were) were unchanged.
> I haven't tried running my
submarine motors in it. But one of my very
> small linear
actuator motors wich
> had been soaking in it for the same
time frame works fine.
> Although the result was great
compared with WD40, it's still degrading
> some plastics &
I'll have
> to rethink what I'm doing with my actuators as
there are electronics
> inside them that may be
affected.
>
Alan
>
>
>
>
>
>
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